diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2ac889c..bb104d4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,13 @@
 # (MODX)EvolutionCMS.libraries.ddTools changelog
 
 
+## Version 0.52 (2021-11-16)
+* \+ `\DDTools\ObjectTools::unfold`: The new method.  
+	Converts a multidimensional array/object into an one-dimensional one joining the keys with `$params->keySeparator`.  
+	For example, it can be helpful while using placeholders like `[+size.width+]`.  
+	See more info and examples in README.md.
+
+
 ## Version 0.51 (2021-11-08)
 * \+ `\DDTools\ObjectTools::convertType`: Added the ability to return `stringQueryFormated`.
 
diff --git a/CHANGELOG_ru.md b/CHANGELOG_ru.md
index d2b8fb1..7f6fbe9 100644
--- a/CHANGELOG_ru.md
+++ b/CHANGELOG_ru.md
@@ -1,6 +1,13 @@
 # (MODX)EvolutionCMS.libraries.ddTools changelog
 
 
+## Версия 0.52 (2021-11-16)
+* \+ `\DDTools\ObjectTools::unfold`: Новый метод.  
+	Преобразует многомерный массив в одномерный, при этом ключи результирующего массива сливаются через `$params->keySeparator`.  
+	Например, это может быть полезно при необходимости использования «вложенных плэйсхолдеров» (`[+size.width+]`).  
+	См. больше информации и примеров в README.md.
+
+
 ## Версия 0.51 (2021-11-08)
 * \+ `\DDTools\ObjectTools::convertType`: Добавлена возможность конвертировать в `stringQueryFormated`.
 
diff --git a/README.md b/README.md
index 40d3350..82b97ff 100644
--- a/README.md
+++ b/README.md
@@ -405,6 +405,45 @@ Merge the contents of two or more objects or arrays together into the first one.
 	* Default value: `true`
 
 
+##### `\DDTools\ObjectTools::unfold($params)`
+
+Converts a multidimensional array/object into an one-dimensional one joining the keys with `$params->keySeparator`.
+For example, it can be helpful while using placeholders like `[+size.width+]`.
+
+* `$params`
+	* Desctription: Parameters, the pass-by-name style is used.
+	* Valid values:
+		* `stdClass`
+		* `arrayAssociative`
+	* **Required**
+	
+* `$params->object`
+	* Desctription: An object/array to convert.
+	* Valid values:
+		* `stdClass`
+		* `arrayAssociative`
+	* **Required**
+	
+* `$params->keySeparator`
+	* Desctription: Separator between nested keys in the result object/array.
+	* Valid values: `string`
+	* Default value: `'.'`
+	
+* `$params->keyPrefix`
+	* Desctription: Prefix of the keys of an object/array (it's an internal varible, but can be used if required).
+	* Valid values: `string`
+	* Default value: `''`
+
+
+###### Returns
+
+* `$result`
+	* Desctription: Unfolded object/array. Type of results depends on `$params->object`.
+	* Valid values:
+		* `stdClass`
+		* `array`
+
+
 #### `\DDTools\BaseClass`
 
 Simple class with some small methods facilitating your work.
@@ -975,6 +1014,94 @@ stdClass::__set_state(array(
 ```
 
 
+#### `\DDTools\ObjectTools::unfold($params)`
+
+
+##### Unfold an object
+
+```php
+var_export(\DDTools\ObjectTools::unfold([
+	'object' => (object) [
+		'name' => 'Elon Musk',
+		'address' => (object) [
+			'line1' => '3500 Deer Creek Road',
+			'city' => 'Palo Alto',
+			'state' => 'California',
+			'country' => 'United States'
+		]
+	]
+]));
+```
+
+Returns:
+
+```php
+stdClass::__set_state(array (
+	'name' => 'Elon Musk',
+	'address.line1' => '3500 Deer Creek Road',
+	'address.city' => 'Palo Alto',
+	'address.state' => 'California',
+	'address.country' => 'United States'
+))
+```
+
+
+##### Unfold an array
+
+```php
+var_export(\DDTools\ObjectTools::unfold([
+	'object' => [
+		'a' => 'a val',
+		'b' => [
+			'b1' => 'b1 val',
+			'b2' => [
+				'b21' => 'b21 val',
+				'b22' => 'b22 val'
+			]
+		],
+		'c' => 'c val'
+	]
+]));
+```
+
+Returns:
+
+```php
+array (
+	'a' => 'a val',
+	'b.b1' => 'b1 val',
+	'b.b2.b21' => 'b21 val',
+	'b.b2.b22' => 'b22 val',
+	'c' => 'c val'
+)
+```
+
+
+##### Use custom key separator
+
+```php
+var_export(\DDTools\ObjectTools::unfold([
+	'object' => [
+		'name' => 'Elon Musk',
+		'parents' => [
+			'mother' => 'Maye Musk',
+			'father' => 'Errol Musk'
+		]
+	],
+	'keySeparator' => '_'
+]));
+```
+
+Returns:
+
+```php
+stdClass::__set_state(array (
+	'name' => 'Elon Musk',
+	'parents_mother' => 'Maye Musk',
+	'parents_father' => 'Errol Musk'
+))
+
+
 #### `\DDTools\ObjectTools::isPropExists($params)`
 
 Checks if the object, class or array has a property / element using the same syntax.
diff --git a/composer.json b/composer.json
index 9841f38..539b5f6 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
 	"name": "dd/evolutioncms-libraries-ddtools",
 	"type": "modxevo-library-ddtools",
-	"version": "0.51.0",
+	"version": "0.52.0",
 	"description": "A library with various tools facilitating your work.",
 	"keywords": [
 		"modx",
diff --git a/modx.ddtools.class.php b/modx.ddtools.class.php
index 7932d98..d0adfc5 100644
--- a/modx.ddtools.class.php
+++ b/modx.ddtools.class.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * EvolutionCMS.libraries.ddTools
- * @version 0.51 (2021-11-08)
+ * @version 0.52 (2021-11-16)
  * 
  * @see README.md
  * 
@@ -286,66 +286,6 @@ public static function explodeAssoc(
 		return $result;
 	}
 	
-	/**
-	 * unfoldArray
-	 * @version 1.0.5 (2019-06-22)
-	 * 
-	 * @desc Converts a multidimensional array into an one-dimensional one joining the keys with '.'. It can be helpful while using placeholders like [+size.width+].
-	 * @example [
-	 * 	'a' => 'a val',
-	 * 	'b' => [
-	 * 		'b1' => 'b1 val',
-	 * 		'b2' => [
-	 * 			'b21' => 'b2.1 val',
-	 * 			'b22' => 'b2.2 val'
-	 * 		]
-	 * 	],
-	 * 	'c' => 'c val'
-	 * ] turns into [
-	 * 	'a' => 'a val',
-	 * 	'b.b1' => 'b1 val',
-	 * 	'b.b2.b21' => 'b2.1 val',
-	 * 	'b.b2.b22' => 'b2.2 val',
-	 * 	'c' => 'c val'
-	 * ].
-	 * 
-	 * @param $array {array} — An array to convert. @required
-	 * @param $keyPrefix {string} — Prefix of the keys of an array (it's an internal varible, can be used if required). Default: ''.
-	 * 
-	 * @return {array} — Unfolded array.
-	 */
-	public static function unfoldArray(
-		$array,
-		$keyPrefix = ''
-	){
-		$result = [];
-		
-		//Перебираем массив
-		foreach (
-			$array as
-			$key =>
-			$val
-		){
-			//Если значение является массивом
-			if (is_array($val)){
-				//Запускаем рекурсию дальше
-				$result = array_merge(
-					$result,
-					self::unfoldArray(
-						$val,
-						$keyPrefix . $key . '.'
-					)
-				);
-			//Если значение — не массив
-			}else{
-				//Запоминаем (в соответствии с ключом родителя)
-				$result[$keyPrefix . $key] = $val;
-			}
-		}
-		
-		return $result;
-	}
-	
 	/**
 	 * sort2dArray
 	 * @version 1.2.1 (2021-03-09)
@@ -529,56 +469,6 @@ public static function parseFileNameVersion($file){
 		return $result;
 	}
 	
-	/**
-	 * createDir
-	 * @version 1.0 (2019-10-22)
-	 * 
-	 * @desc Makes directory using `$modx->config['new_folder_permissions']`. Nested directories will be created too. Doesn't throw an exception if the folder already exists.
-	 * 
-	 * @param $params {stdClass|arrayAssociative} — Parameters, the pass-by-name style is used. @required
-	 * @param $params->path {string} — The directory path. @required
-	 * 
-	 * @return {boolean} — Success status.
-	 */
-	public static function createDir($params){
-		return \DDTools\FilesTools::createDir($params);
-	}
-	
-	/**
-	 * copyDir
-	 * @version 1.1 (2018-10-02)
-	 * 
-	 * @desc Copies a required folder with all contents recursively.
-	 * 
-	 * @param $sourcePath {string} — Path to the directory, that should copied. @required
-	 * @param $destinationPath {string} — The destination path. @required
-	 * 
-	 * @return {boolean} — Returns true on success or false on failure.
-	 */
-	public static function copyDir(
-		$sourcePath,
-		$destinationPath
-	){
-		return \DDTools\FilesTools::copyDir([
-			'sourcePath' => $sourcePath,
-			'destinationPath' => $destinationPath
-		]);
-	}
-	
-	/**
-	 * removeDir
-	 * @version 1.1 (2018-10-02)
-	 * 
-	 * @desc Removes a required folder with all contents recursively.
-	 * 
-	 * @param $path {string} — Path to the directory, that should removed. @required
-	 * 
-	 * @return {boolean}
-	 */
-	public static function removeDir($path){
-		return \DDTools\FilesTools::removeDir($path);
-	}
-	
 	/**
 	 * generateRandomString
 	 * @version 1.0.3 (2018-06-17)
@@ -2872,6 +2762,72 @@ public static function getResponse(){
 		return new \DDTools\Response();
 	}
 	
+	/**
+	 * unfoldArray
+	 * @version 1.1 (2021-11-16)
+	 * 
+	 * @see README.md (\DDTools\ObjectTools::unfold)
+	 */
+	public static function unfoldArray(
+		$array,
+		$keyPrefix = ''
+	){
+		return \DDTools\ObjectTools::unfold([
+			'object' => $array,
+			'keyPrefix' => $keyPrefix
+		]);
+	}
+	
+	/**
+	 * createDir
+	 * @version 1.0 (2019-10-22)
+	 * 
+	 * @desc Makes directory using `$modx->config['new_folder_permissions']`. Nested directories will be created too. Doesn't throw an exception if the folder already exists.
+	 * 
+	 * @param $params {stdClass|arrayAssociative} — Parameters, the pass-by-name style is used. @required
+	 * @param $params->path {string} — The directory path. @required
+	 * 
+	 * @return {boolean} — Success status.
+	 */
+	public static function createDir($params){
+		return \DDTools\FilesTools::createDir($params);
+	}
+	
+	/**
+	 * copyDir
+	 * @version 1.1 (2018-10-02)
+	 * 
+	 * @desc Copies a required folder with all contents recursively.
+	 * 
+	 * @param $sourcePath {string} — Path to the directory, that should copied. @required
+	 * @param $destinationPath {string} — The destination path. @required
+	 * 
+	 * @return {boolean} — Returns true on success or false on failure.
+	 */
+	public static function copyDir(
+		$sourcePath,
+		$destinationPath
+	){
+		return \DDTools\FilesTools::copyDir([
+			'sourcePath' => $sourcePath,
+			'destinationPath' => $destinationPath
+		]);
+	}
+	
+	/**
+	 * removeDir
+	 * @version 1.1 (2018-10-02)
+	 * 
+	 * @desc Removes a required folder with all contents recursively.
+	 * 
+	 * @param $path {string} — Path to the directory, that should removed. @required
+	 * 
+	 * @return {boolean}
+	 */
+	public static function removeDir($path){
+		return \DDTools\FilesTools::removeDir($path);
+	}
+	
 	/**
 	 * screening
 	 * @deprecated Use ddTools::escapeForJS.
diff --git a/src/ObjectTools/ObjectTools.php b/src/ObjectTools/ObjectTools.php
index d8563e7..38ec36c 100644
--- a/src/ObjectTools/ObjectTools.php
+++ b/src/ObjectTools/ObjectTools.php
@@ -361,4 +361,87 @@ public static function extend($params){
 		
 		return $result;
 	}
+	
+	/**
+	 * unfold
+	 * @version 1.1 (2021-11-17)
+	 * 
+	 * @see README.md
+	 * 
+	 * @return {stdClass|array}
+	 */
+	public static function unfold($params){
+		$params = self::extend([
+			'objects' => [
+				//Defaults
+				(object) [
+					'keySeparator' => '.',
+					'keyPrefix' => '',
+					//The internal parameter, should not be used outside. Used only in child calls of recursion.
+					'isSourceObject' => null
+				],
+				$params
+			]
+		]);
+		
+		//Array is used as base and it always be returned in child calls of recursion
+		$result = [];
+		
+		$isSourceObject =
+			//If it's the first call of recurson
+			is_null($params->isSourceObject) ?
+			//Use original type
+			is_object($params->object) :
+			//Use from parent call of recursion
+			$params->isSourceObject
+		;
+		
+		//Iterate over source
+		foreach (
+			$params->object as
+			$key =>
+			$value
+		){
+			//If the value must be unfolded
+			if (
+				(
+					$isSourceObject &&
+					is_object($value)
+				) ||
+				(
+					!$isSourceObject &&
+					is_array($value)
+				)
+			){
+				$result = array_merge(
+					$result,
+					self::unfold([
+						'object' => $value,
+						'keyPrefix' =>
+							$params->keyPrefix .
+							$key .
+							$params->keySeparator
+						,
+						'isSourceObject' => $isSourceObject
+					])
+				);
+			//Если значение — не массив
+			}else{
+				//Запоминаем (в соответствии с ключом родителя)
+				$result[$params->keyPrefix . $key] = $value;
+			}
+		}
+		
+		if (
+			//If it's first call of recurson
+			is_null($params->isSourceObject) &&
+			//And the final result must be an object
+			$isSourceObject
+		){
+			//Only the first call of recursion can return an object
+			$result = (object) $result;
+		}
+		
+		return $result;
+	}
 }
\ No newline at end of file